Film feeding apparatus for camera

ABSTRACT

A film feeding apparatus for a camera has a spool chamber, a spool, and a motor. The spool is rotated in the spool chamber for winding up a film. The motor is arranged within the outer diameter of the film winding of the spool to expose the outer periphery in the spool chamber.

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is based upon and claims the benefit of priorityfrom the prior Japanese Patent Application No. 2000-169210, filed Jun.6, 2000, the entire contents of which are incorporated herein byreference.

BACKGROUND OF THE INVENTION

[0002] The present invention relates to a film feeding apparatus for acamera, and more particularly to a film feeding apparatus for a camerahaving a spool device.

[0003] As prior art associated with a film feeding apparatus, there isknown, for example, a film feeding apparatus disclosed in Jpn. Pat.Appln. KOKAI Publication No. 60-166940.

[0004] This film feeding apparatus has a spool having a relatively smalldiameter as a spool device, but has a disadvantage in that applying thefilm feeding apparatus to a camera leads to an increase in the size ofthe camera itself because the motor is arranged at a location differentfrom the spool chamber.

[0005] Furthermore, in a “motor incorporated spool” disclosed in Jpn.Pat. Appln. KOKAI Publication No. 60-100127, a motor and a spool arecoaxially arranged, and this motor is incorporated into the spool. Thus,there is a disadvantage in that the diameter of the spool is increasedand a large spool chamber is required so that the size of the camera isincreased despite the fact that the space is more efficiently used.

[0006] In this manner, the conventional technology of the film feedingapparatus such as a spool device having a small diameter and a motorincorporated spool is capable of improving a usage efficiency of spacein the spool chamber.

[0007] However, the motor incorporated spool inevitably requires a largespool chamber space because of the structure in which the motor isincorporated into the spool chamber. Despite the fact that such astructure is one factor which increases the size of the camera itself,no specific proposal is presented with respect to the structure of thespool chamber for settling such a problem.

BRIEF SUMMARY OF THE INVENTION

[0008] An object of the present invention is to provide a smaller sizefilm feeding apparatus by arranging a spool and a motor or the like in acoaxial manner and reducing the diameter of the spool.

[0009] In order to attain the above object, according to one aspect ofthe present invention, there is provided a film feeding apparatus for acamera, the apparatus comprising:

[0010] a spool chamber;

[0011] a spool which rotates in the spool chamber for winding up a film;and

[0012] a motor arranged within an outer diameter of the spool to exposean outer periphery in the spool chamber.

[0013] Furthermore, according to another aspect of the presentinvention, there is provided a film feeding apparatus for a camera, theapparatus comprising:

[0014] two spool members which mutually and coaxially rotate for windingup a film, the members being arranged in a mutually separated manner inan axial direction; and

[0015] a motor having a diameter smaller than the outer diameter of eachof the spool member, the motor being accommodated in a cylindrical areaformed between the two spool members, the motor having an outerperiphery exposed to the winding surface of the film.

[0016] Furthermore, according to another aspect of the presentinvention, there is provided a film feeding apparatus for a camera, thedevice comprising:

[0017] a spool chamber;

[0018] a spool which rotates in the spool chamber for winding up a film;and

[0019] a column-like member which is arranged within the largestdiameter of the spool for winding up a film and which exposes the outerperiphery in the spool chamber.

[0020] According to still another aspect of the present invention, thereis provided a film feeding apparatus or a camera, the device comprising:

[0021] a spool chamber; and

[0022] a plurality of spools rotatably arranged in a separating mannerabove and below the spool chamber for winding up the film.

[0023] Additional objects and advantages of the invention will be setforth in the description which follows, and in part will be obvious fromthe description, or may be learned by practice of the invention. Theobjects and advantages of the invention may be realized and obtained bymeans of the instrumentalities and combinations particularly pointed outhereinafter.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

[0024] The accompanying drawings, which are incorporated in andconstitute a part of the specification, illustrate presently preferredembodiments of the invention, and together with the general descriptiongiven above and the detailed description of the preferred embodimentsgiven below, serve to explain the principles of the invention.

[0025]FIG. 1 is a perspective view showing an outer appearance of acamera 1 incorporating a film feeding apparatus for a camera accordingto the present invention.

[0026]FIG. 2 is a cross sectional view showing a structure of a filmfeeding apparatus for a camera, the view showing a cross section of acamera taken along the line 2-2 of FIG. 1.

[0027]FIG. 3A is a longitudinal sectional view showing a structure of across section of an essential portion in a film feeding apparatus for acamera according to a first embodiment of the present invention.

[0028]FIG. 3B is a cross sectional view showing in an enlarged state aportion of a spool pawl taken along the line 3B-3B of FIG. 3A.

[0029]FIG. 4 is a longitudinal sectional view showing the structure ofan essential portion in a film feeding apparatus for a camera accordingto a second embodiment of the present invention.

[0030]FIG. 5 is a longitudinal sectional view showing a structure of anessential portion of a film feeding apparatus for a camera according toa third embodiment of the present invention.

[0031]FIG. 6 is a cross sectional view showing in an enlarged state aportion of a spool as a variation of FIG. 3B.

DETAILED DESCRIPTION OF THE INVENTION

[0032] Reference will now be made in detail to the presently preferredembodiments of the invention as illustrated in the accompanyingdrawings, in which like reference numerals designate like orcorresponding parts.

First Embodiment

[0033]FIG. 1 is a view showing an outer appearance of a camera 1incorporating a film feeding apparatus for a camera according to thepresent invention.

[0034] This camera 1 is, for example, a zoom-type automatic focus camerawhich is constituted in an easily portable manner, the camera comprisinga lens barrel 10 which can be freely advanced and retreated from acamera main body.

[0035] Then, in this camera 1, a camera main body including a filmfeeding apparatus is protected with a front cover projectingly providinga grip portion 4, a rear cover (not shown), and a rear door engaged onthe rear cover in a manner that the door can be freely opened andclosed.

[0036] On an upper surface of the front cover, a zoom lever 6, a release7, various kinds of setting buttons 8 and a display portion 9 comprisingan LCD are arranged as shown in the drawings.

[0037] Above the lens barrel 10, a finder window 12 including a windowfor light measurement is arranged in parallel with an electronic flashwindow.

[0038] A film feeding apparatus for this camera 1 has a sectionalstructure as shown in FIG. 2 as the first embodiment.

[0039] Incidentally, FIG. 2 is a view showing a structure of a filmfeeding apparatus which is incorporated in this camera 1, the viewshowing a cross sectional view of the camera 1 taken along line 2-2 ofFIG. 1.

[0040] The film feeding apparatus for this camera 1 is constituted insuch a manner that a rear door 2 is closed after placing a filmcartridge 30 in a film cartridge chamber while the film 3 isaccommodated in a spool chamber 20 as follows:

[0041] That is, the apparatus has a structure constituted in such amanner that each frame of the film 31 is accordingly wound up by thewinding of the end of the film 31 between the spools 22 (22 c) in thespool chamber 22 along the film channel between the pressed plate 3energized with a plate spring 3 a and a rear end of the lens barrel 10.

[0042] The spools 22 (22 c) each has a surface 22 e (22 f) for windingof the film.

[0043] Consequently, there are arranged guide plates 23 a and 23 b forguiding the film 31 correctly around the periphery of the spool 22, androllers 24 a and 24 b in the spool chamber 20 as shown in the drawings.

[0044] An optical system 5 provided in the lens barrel 10 is arranged ina position relationship such that the optical axis of the optical systempasses through the center on the film channel.

[0045] Furthermore, in the grip portion 4, a main capacitor 26 for anelectronic flash and a battery 27 are arranged adjacent to each otherwhile the film cartridge 30 can be accommodated adjacent to the maincapacitor 26 and the battery 27.

[0046]FIG. 3A is a view showing a vertical section structure of anessential portion of the film feeding apparatus for a camera accordingto the first embodiment of the present invention.

[0047] In the vicinity of the center of the spool chamber 20, the motor21 is arranged with the rotation shaft 21 a of the motor projecting fromthe illustrated lower end, in a downward direction.

[0048] In this case, the illustrated lower end side of the motor 21 isfixed on the motor base 32 with a motor screw 36 to be set so as not tobe moved.

[0049] Here, the illustrated upper end side of the motor 21 is pressedfrom above as shown with the spool lid 15 engaged with a screw 34.

[0050] Then, a pinion gear 40 is fixed on the rotation shaft 21 a of themotor 21.

[0051] Further, a terminal 21 b projecting from the illustrated upperend of the motor 21 is connected to a lead wire 16.

[0052] That is, a motor 21 is provided in a cylindrical space formedwith a diameter of the spool 22 while the spool 22 is rotated on theside of the outer periphery of the spool lid 15.

[0053] Then, a plurality of gears 41 and 42 are rotatably meshed andsupported on the gear base plate 33 which also serves as a bottom plateof a camera main body.

[0054] In detail, the rotation shaft 21 of the motor 21 is arrangedalong the rotation shaft M0 which coincides with the lengthwisedirection. (See FIG. 3B).

[0055] Then, the pinion gear 40 attached on this rotation shaft 21 a ismeshed with the inner teeth of the gear 41.

[0056] The outer teeth (pinion portion) of this gear 41 are meshed withthe spur gear of the adjacent gear 42.

[0057] The outer teeth (pinion portion) of this gear 42 are meshed withthe gear 43 attached on the lower end of the shaft 35.

[0058] Thus, the rotation drive force from the rotation shaft 21 a ofthe motor 21 is transmitted to the shaft 35.

[0059] Then, a transmission mechanism is constituted such that one ofthe spools 22 and 22 c (spool 22 in this embodiment) separately providedabove and below the spool chamber 20 is rotated and driven via a shaft35 extending in a lengthwise direction in the vicinity of a partitionwall of this spool chamber 20.

[0060] The spool 22 provided above as the first spool has a spool pawl22 a and a spool gear portion 22|i b.

[0061] Thus spool pawl 22 a is provided in a convex manner on a part ofthe outer periphery of the spool 22 as shown in FIG. 3.

[0062] This spool gear portion 22 b is meshed with the gear 44 providedon an upper end portion of the shaft 35 to rotate the above spool 22with a drive force from the motor 21 via a predetermined gear group(gears 41, 42, 43 and 44) and the shaft 35.

[0063] On the other hand, the spool 22 c provided below as the secondspool is coaxially provided on the rotation shaft M0. However, the spool22 c is not driven with the drive force from the motor 21, and isrotatably provided as a slave.

[0064] Incidentally, FIG. 3B is a view showing a cross section of thespool 22 c taken along the line 3B-3B of FIG. 3A.

[0065] That is, one spool pawl 22A is projectingly provided verticallyon the peripheral portion on an extension line passing through therotation shaft M0 of the spool 22. The spool pawl 22A fits into aperforation (hole) of the film (not shown) while being rotated toprovide a feeding force to the film.

[0066] In this manner, the spool device portion for winding up the filmout of the film feeding apparatus has the motor 21 which serves as adrive source and a pair of (two) spools 22 and 22 c arranged via apredetermined gear system (gears 41, 42, 43 and 44) so as to be rotatedcentering on this motor 21 on at least one end portion on both ends ofthis motor.

[0067] One of two spools (spool 22 c in this case) is constituted insuch a manner that the spool can be freely rotated with respect to theother spool (spool 22 in this case) on one end portion on the rotationshaft of the motor 21.

[0068] Furthermore, the above pair of spools 22 and 22 c are integrallyrotated in synchronization with the film with friction in the state inwhich film is wound upon the spools.

[0069] Incidentally, the motor 21 is formed, for example, in acylindrical configuration. (With respect to the cross sectionconfiguration thereof, see FIG. 2).

[0070] Furthermore, the spools 22 and 22 c are formed into a cylindricalconfiguration having a flange.

[0071] This cylindrical portion has a diameter φD slightly larger thanthe diameter φd of the motor 21.

[0072] Specifically, for example, the motor 21 having a diameter φd of10 mm and a length of 25 mm is arranged in the center of the spoolchamber 20.

[0073] Furthermore, the spools 22 and 22 c each having a diameter φD of10.6 mm are rotatably and coaxially arranged in the vicinity of bothends above and below the motor 21.

[0074] Out of the above and below spools 22 and 22 c, on at least one ofthe spools (particularly, the spool 22 on the drive side), a highfriction body 22 e formed of rubber or the like may be provided on anouter peripheral surface as shown in FIG. 6 instead of the spool pawl 22a extending on the side of the longitudinal direction of the film 31 inFIG. 3B.

[0075] Incidentally, the other spool 22 c is constituted in such amanner that the spool 22 c is rotated as a slave as described above,when the film 31 is wound around the spool 22.

[0076] In this manner, in the film feeding apparatus shown as an examplein the first embodiment, the first spool and the second spool arerotatably and coaxially provided on both ends of the first spool and thesecond spool as the spools 22 and 22 c of the spool chamber 20 foraccommodating the film. Furthermore, the apparatus is constituted insuch a manner that the motor 21 which serves as a rotation drive sourceis coaxially arranged between the first spool and the second spool.

[0077] Then, the apparatus is constituted in such a manner that thedrive force transmission channel rotates only the spool 22 as the firstspool via the above gear group (gears 41, 42, 43 and 44) while thesecond spool is rotated as a slave along with the winding up of the film31.

[0078] With such an arrangement, the film 31 pulled out from the filmcartridge 30 is wound around the coaxial motor 21 and the spools 22 and22 c in a roll-like manner.

[0079] However, a slight gap is provided between the peripheral surfaceof the motor 21 and the film surface so that the peripheral surface ofthe motor 21 does not come into contact with the film surface.Consequently, the surface of the film 31 is not scratched.

[0080] If even, scratch is done to the rear surface of the film 31 tocontact the film 31 and the motor 21, no influence is done to thephotographing surface of the film 31.

[0081] Furthermore, the film feeding apparatus shown as an example ofthe first embodiment is constituted in a structure in which the spoolmember is vertically divided into upper and lower portions and a motor21 having a small diameter is arranged unlike the conventional motorincorporated spool covering the peripheral surface of the motor 21.

[0082] As a consequence, the spool member itself can be reduced inweight, the film can be wound up to a thin thickness. Thus, the filmfeeding apparatus is provided in which the spool chamber 20 can beeffectively used.

[0083] Thus, the space efficiency in the camera main body can beimproved by incorporating such a film feeding apparatus in a camera orthe like so that the camera itself can be reduced in size.

[0084] Incidentally, as the first embodiment, the following variationcan be put into practice.

[0085] For example, in the first embodiment, the film feeding apparatus(or the spool device) for a camera has been explained as one example.The embodiment is not limited to the camera. This film feeding apparatuscan be widely applied in machines other than a camera.

[0086] Then, the motor 21 can be used as a drive source not only forrotating and driving the spool 22 but also for driving other mechanismswhen desired.

[0087] Furthermore, the motor 21 may be a motor for driving othermechanism which is not associated at all with the film feedingapparatus.

[0088] Incidentally, in the first embodiment, the outer periphery of themotor is exposed in the spool chamber. The motor can be made favorablein outer appearance by covering the outer periphery of the motor with amotor cover member 21 c as shown in FIG. 3A.

[0089] In this case, as a material quality of the motor cover member 21c, a cylindrical synthetic resin having lubricating characteristic suchas PTFE or the like is favorable.

[0090] This is intend to allow the film to slide on the peripheralsurface of the motor cover member when the film is wound up with thespool.

[0091] According to the variations, the above structure is useful forreducing the size of the film feeding apparatus, and an equivalenteffect or a better effect than the first embodiment can be expected.

Second Embodiment

[0092] Next, a second embodiment of the present invention will beexplained.

[0093] However, here, items other than those previously described willbe explained.

[0094]FIG. 4 is a longitudinal sectional view showing a structure of thefilm feeding apparatus for a camera according to the second embodiment.

[0095] This film feeding apparatus is one example which is constitutedin such a manner that not only the spool 22 provided above the motor 21but also the spool 22 c provided below the motor 21 are rotatablydriven.

[0096] In order to drive the spools 22 and 22 c in this manner, thespool gear portion 22 d is provided on the lower spool 22 c while apredetermined gear system is provided for driving this spool gearportion 22 d.

[0097] That is, the spool gear portion 22 d is put into practice in agear structure in which a drive force transmission channel which isdifferent from that of the first embodiment is provided, which is meshedwith the gear 43 to be driven at a position shown in the area C shown bya broken line in the drawing.

[0098] In a concrete configuration, outer teeth are formed on anoutermost peripheral surface of the above spool 22 c.

[0099] Then, a gear 43 having a pinion portion is rotatably provided atone end side of shaft 35 at a position meshing with the outer teeth onthe outermost peripheral surface of this spool 22 c.

[0100] With the rotation of the gear 43, the gear 44 provided on theother end of the shaft 35 and the spool gear 22 b of the above spool 22are meshed into each other to be rotated.

[0101] As a consequence, the spool 22 and the spool 22 c are constitutedto be synchronized while being rotated at both an upper and a lowerlocation.

[0102] That is, the spool 22 and the spool 22 c provided separatelyabove and below the spool chamber 20 form a synchronization mechanism inwhich the spool 22 and the spool 22 c are respectively synchronized tobe rotatably driven via a shaft 35 extending in a lengthwise directionin the vicinity of the partition wall of this spool chamber 20.

[0103] In this manner, in the film feeding apparatus shown as an examplein the second embodiment, the spool 22 c as the second spool providedcoaxially at a lower location on the rotation shaft M0 (see FIG. 3B) isalso driven with the motor 21 via the above gear group (gears 41, 42 and43).

[0104] That is, this motor 21 is used for a drive source for rotatingand driving these spools 22 and 22 c.

[0105] Since the pair of upper and lower spools are synchronized to berotatably driven, irregularities in the winding of the film do not occurwhile the spool is rotated in a stable manner.

[0106] According to the second embodiment, it is possible to provide afilm feeding apparatus for a camera which enables a reliable windingoperation of the film while attempting to reduce the size of the filmfeeding apparatus by adopting the above structure.

[0107] Incidentally, in the above second embodiment, the followingvariation may be put into practice.

[0108] For example, the motor 21 may be arranged with the rotation shaftbeing directed upward, and the gear base plate 33 or the like may beprovided at the upper portion thereof.

[0109] Besides, furthermore, the structure arrangement of the gearsystem may be appropriately changed when needed.

[0110] Of course, this motor 21 may be employed for driving othermechanism than the pair of spools 22, 22 c.

[0111] This motor 21 may be a motor for driving another mechanism whichis not associated with the film feeding apparatus at all.

Third Embodiment

[0112] Next, a third embodiment of the present invention will beexplained.

[0113] However, items which are different from the described firstembodiment will be primarily described in detail in the same manner asthe second embodiment.

[0114]FIG. 5 is a longitudinal sectional view showing a structure of afilm feeding apparatus for a camera according to a third embodiment.

[0115] In this embodiment, there is shown an example of a capacitorincorporated spool which is characterized in that a main capacitor 26for an electronic flash is coaxially arranged between the first spooland the second spool.

[0116] As a consequence, in this case, a structure is adopted in whichthe main capacitor 26 is provided in the spool chamber 20. Thus, thestructure may be such that, for example, the motor 21 as the drivesource is arranged in a space adjacent to the battery 27 or the filmcartridge 30 via a partition wall in the grip portion 4.

[0117] The main capacitor 26 for an electronic flash is arrangedvertically in the vicinity or the center of the spool chamber 20.

[0118] In this case, the upper end of the main capacitor 26 is pressedfrom above in the state in which the capacitor terminal 26 a (26 b) fitsinto a portion of the spool lid 15 engaged with the camera main bodywith a screw 34.

[0119] Furthermore, the lower end of the main capacitor 26 is supportedon a capacitor base 39 engaged with a capacitor screw 38 via thecapacitor base 37.

[0120] In this case, the peripheral end portion of the capacitor base 37is formed into a receiving configuration as shown by E of FIG. 3. Thus,an attempt can be made to stabilize the seating for the bottom portionof the main capacitor which is received here.

[0121] Furthermore, it is constituted so that the long axis of the maincapacitor 26 coincides with the rotation shaft.

[0122] Lead wires 16 (one of which not shown) are connected respectivelyto the capacitor terminals 26 a (26 b) projecting to the upper endportion of this main capacitor 26.

[0123] Here, it is constituted so that the drive force is transmittedvia the gear 45 from the drive source.

[0124] In detail, a plurality of gears 41, 42, 43 and 45 are rotatablyor mutually meshed with each other to be supported on the gear baseplate 33.

[0125] Then, the gear 45 is meshed with the gear 41 of the spur gearwhile the outer teeth (pinion portion) of the gear 41 is meshed with thespur gear of the adjacent gear 42 and the outer teeth (pinion portion)of this gear 42 is meshed with the gear 43 attached on the lower end ofthe shaft 35 to transmit the rotation drive force in the same manner.

[0126] Then, the spools 22 and 22 c separately provided above and belowthe spool chamber 20 constitute a synchronization mechanism in which thespools 22 and 22 c are respectively synchronized to be rotatably drivenvia a shaft 35 extending in a lengthwise direction in the vicinity ofthe partition wall of this spool chamber 20.

[0127] In the same manner as described above, the spool 22 (first spool)provided above the main capacitor 26 has a spool pawl 22 a and a spoolgear portion 22 b.

[0128] This spool pawl 22 a is provided in a convex configuration on apart of the periphery of the spool 22 as shown in FIG. 3B.

[0129] The spool gear portion 22 b is constituted in such a manner thatthe portion 22 b is meshed with the gear 44 on the upper end portion ofthe shaft 35 to be rotated with the drive force from the drive source(not shown) with the result that the spool 22 is rotated.

[0130] On the other hand, the apparatus is constituted in such a mannerthe spool 22 c (the second spool) provided below the main capacitor 26is provided coaxially with the main capacitor 26 and is driven via theabove gear group (gears 41, 42, 43 and 44).

[0131] Incidentally, the main capacitor is formed, for example, in acircular configuration.

[0132] Further, the spools 22 and 22 c are formed in a cylindricalconfiguration.

[0133] This cylindrical configuration has a diameter φD slightly largerthan the diameter φd of the main capacitor 26.

[0134] For example, the main capacitor 26 having a diameter φD of 10 mmand a length of 25 mm is arranged in the center.

[0135] Besides, the spools 22, 22 c l each having a diameter φD of 10.6mm are coaxially arranged on the upper and the lower end.

[0136] In this manner, in the film feeding apparatus according to thethird embodiment, the first spool (22) and the second spool (22 c) ofthe spool chamber 20 are rotatably and coaxially provided on both ends,and the film 31 pulled out from the film cartridge 30 is wound on theperiphery of the coaxial main capacitor 26 and the spools 22 and 22 c ina roll-like configuration by arranging the circular-like main capacitor26 between the first spool and the second spool. Thus, the spool chamber20 can be effectively used.

[0137] Furthermore, the peripheral surface of the main capacitor 26 doesnot come into contact with the film surface when the spool device windsup the film so that the surface of the film is not scratched.

[0138] If even, scratch is done to the rear surface of the film 31 tocontact the film 31 and the motor 21, no influence is done to thephotographing surface of the film 31.

[0139] That is, this structure can be referred to as a so-called “maincapacitor incorporated spool” which covers the whole main capacitor 26.The spool member is divided in a vertical direction, and a maincapacitor having a small diameter is arranged therebetween. Thus, theweight of the spool can be reduced.

[0140] Furthermore, this structure enables the film to be wound up to athin thickness with the result that a film feeding apparatus can beprovided in which the space in the spool chamber 20 is effectively used.Thus, the space efficiency in the camera main body incorporating theapparatus can be improved with the result that a reduction in the sizeof the camera can be realized.

[0141] With respect to the third embodiment, the following variation maybe put into practice.

[0142] With such a variation, the equivalent or better effects ascompared with the first and second embodiments described above can beexpected.

[0143] That is, the idea of the above “main capacitor incorporatedspool” can be developed into a coaxial structure with the spool in whichmembers having a long shaft-like configuration such as a cylindricalconfiguration, a square column-like configuration or the like other thanthe motor 21 and the main capacitor 26 are assembled.

[0144] For example, the battery 27, other small capacitors are used inplace of the main capacitor.

[0145] Alternatively, a small cylindrical motor and a capacitor may becoaxially assembled adjacent to each other. In this structure, theeffects of a size reduction can be further improved.

[0146] Additional advantages and modifications will readily occur tothose skilled in the art. Therefore, the invention in its broaderaspects is not limited to the specific details and representativeembodiments shown and described herein. Accordingly, variousmodifications may be made without departing from the spirit or scope ofthe general inventive concept as defined by the appended claims andtheir equivalents.

What is claimed is:
 1. A film feeding apparatus for a camera,comprising: a spool chamber; a spool which rotates in a spool chamberfor winding up a film; and a motor arranged within an outer diameter ofthe spool to expose an outer periphery in the spool chamber.
 2. Theapparatus according to claim 1 , wherein the motor is arranged coaxiallywith the central axis of the spool.
 3. The apparatus according to claim1 , wherein the motor drives the spool for winding up a film.
 4. Theapparatus according to claim 1 , wherein the spool has a rubber memberaround an outer periphery portion thereof.
 5. The apparatus according toclaim 1 , wherein the spool has a pawl which is engaged with aperforation of the film.
 6. The apparatus according to claim 1 , whereinthe spool chamber is arranged in such a manner that first and secondspool members are rotatably arranged respectively on both ends of themotor.
 7. The apparatus according to claim 6 , wherein the motor drivesat least one of the first and the second spool members for winding up afilm.
 8. The apparatus according to claim 6 , wherein the motor drivesboth the first and the second spool members for winding up a film. 9.The apparatus according to claim 6 , wherein either of the first and thesecond spool members has a pawl which is engaged with perforations ofthe film.
 10. A film feeding apparatus for a camera, comprising: twospool members which mutually and coaxially rotate for winding up a film,the members being arranged in a mutually separated manner in their axialdirections; and a motor having a diameter smaller than the outerdiameter of each of the two spool members, the motor being accommodatedin a cylindrical area formed between the two spool members, the motorhaving an outer periphery exposed to the winding surface of the film.11. The apparatus according to claim 10 , wherein the motor drives atleast one of the two spool members for winding up a film.
 12. Theapparatus according to claim 10 , wherein the motor drives both of thetwo spool members for winding up a film.
 13. The apparatus according toclaim 10 , wherein one of the two spool members has a pawl which isengaged with perforations of the film.
 14. A film feeding apparatus fora camera, comprising: a spool chamber; a spool which rotates in thespool chamber for winding up a film; and a column-like member which isarranged within the largest diameter of the spool for winding up a filmand which exposes the outer periphery in the spool chamber.
 15. Theapparatus according to claim 14 , wherein the column-like member is acapacitor.
 16. The apparatus according to claim 14 , wherein thecolumn-like member is a motor for winding up a film.
 17. The apparatusaccording to claim 14 , wherein the column-like member is attached in astable state.
 18. A film feeding apparatus for a camera, comprising: aspool chamber; and a plurality of spools rotatably arranged in aseparated manner above and below the spool chamber for winding up afilm.